from the global resources of abc news, with terry moran, cynthia mcfadden and bill weir in new york city, this is "nightline," november 30th, 2012. >> good evening, i'm terry moran. tonight, a multimillion dollar mystery. while the rest of the country is tearing up their worthless lottery tickets in disappointment, the identity of one of two powerball winners remains illusive. a surveillance video, the only clue. well, with the jackpot worth over $580 million, that's a lot of reasons to be curious. abc's david wright brings us america's newest overnight millionaires. >> reporter: at a gas station in maryland, a mystery man checks his numbers and then dances a jig. could it be the powerball shuffle? >> he says, is this the right numbers? i said, yeah, man, you got them all. >> reporter: in a small town in missouri, at the high school where they first fell in love, cindy and mark hill today insisted that huge check won't change their lives all that much. >> we will still be going down to the corner cafe for breakfast or fish day, i can guarantee you that. we're as common as anybody. we jus